How many people can use same tower?
Does anyone know how many people can use a cell tower at the same time, or is there a way to calculate it?
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Actually, that would be 8 per CELL on GSM, 10 per CELL on CDMA. Most towers are multi-cell.
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Sorry for the misclarification. For some reason I thought it was 20 per on CDMA. Oh well, who cares about them anyway!
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The answer to your question is a little complex but here goes.
one GSM channel is 200 KHZ wide and it can support 8 users.
One CDMA channel is 1.25 MHZ wide and it can support anywhere from 30-50 users depending on where the operator feels comfortable with the noise floor.
So if like most carriers you have 30 MHZ of spectrum you take the channel width and divide it into the spectrum.
This leaves 150 GSM channels of which only 75 can be considered because there is a channel for both sides of the conversation. Multiply that by 8 and you get 600. Now divide that by the amount of other towers that can be seen by your tower and you get 300 if it can only see 1 other tower, 200 if it can see two towers and 150 if it can see 3 towers. T...
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one GSM channel is 200 KHZ wide and it can support 8 users.
One CDMA channel is 1.25 MHZ wide and it can support anywhere from 30-50 users depending on where the operator feels comfortable with the noise floor.
So if like most carriers you have 30 MHZ of spectrum you take the channel width and divide it into the spectrum.
This leaves 150 GSM channels of which only 75 can be considered because there is a channel for both sides of the conversation. Multiply that by 8 and you get 600. Now divide that by the amount of other towers that can be seen by your tower and you get 300 if it can only see 1 other tower, 200 if it can see two towers and 150 if it can see 3 towers. T...
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Oh, one thing I forgot to say about CDMA. I quoted maximums. the problem with measuring CDMA is that it uses spectrum dynamically. I use almost no bandwidth when I am listening.
On a given CDMA network those numbers can be lower with higher quality or higher with some system generated noise. Most operators go for the lower number of users to increase quality because very few towers operate near capacity on either a GSM or CDMA system.
On a given CDMA network those numbers can be lower with higher quality or higher with some system generated noise. Most operators go for the lower number of users to increase quality because very few towers operate near capacity on either a GSM or CDMA system.
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ah so i guess that would be why sometimes when you pick up a call and start talking, the other people can't hear anything that you're saying except silence? (too much spectrum in use?)
and wow... you're really smart.
i would have never known that. i swear these threads are like a cellular textbook but for people that dont want to spend the money on education and books 🤣
and wow... you're really smart.
i would have never known that. i swear these threads are like a cellular textbook but for people that dont want to spend the money on education and books 🤣
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I'd say you did a pretty damn good job explaining it, I can add on to that, too as far as how GPRS effects that, however, I'm not sure about EV-DO.
GPRS, depending on type, can vary in speed, but can support the same number of users, because it doesn't require any new or seperate channels; it simply grabs short time slots allocated from channels dedicated to voice traffic. It was believed that this would improve effeciency this way because of channels being able to be simeloutaneously used. For the most part, it's a very good system.
As said earlier, each dedicated channel is divided into 8 slots. (time slots). Each time slot supports a maximum of 13.4kbps. Of these 8 time slots, there is sometimes 1 that is reversed for control. It ...
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GPRS, depending on type, can vary in speed, but can support the same number of users, because it doesn't require any new or seperate channels; it simply grabs short time slots allocated from channels dedicated to voice traffic. It was believed that this would improve effeciency this way because of channels being able to be simeloutaneously used. For the most part, it's a very good system.
As said earlier, each dedicated channel is divided into 8 slots. (time slots). Each time slot supports a maximum of 13.4kbps. Of these 8 time slots, there is sometimes 1 that is reversed for control. It ...
(continues)
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